EXPAND-Tite waterstop
RESULTS:
Long-Term, Continuous Submersion Tests of Hydrophilic Compounds
Test Scope:
To measure the comparative changes in volume and weight of EXPAND-Tite and a clay-based, traditional hydrophilic compound following long-term, continuous submersion in water.
Testing Method:
Same-size (3/4”H X 1”W X 4”L) samples of the two hydrophilic compounds were fully immersed in water for the specified periods of time.
Evaluation Methods:
Each specimen was evaluated by both quantitative and qualitative standards.
Quantitative Standards:
The volumetric change standard was based on measuring dimensional changes over the period of exposure. The weight change standard was based on weighing each specimen and recording any gains or losses at specified intervals.
Qualitative Standards:
The qualitative standards for both volumetric and weight changes were the same, with each being based on observable changes in the overall appearance of the test specimens at various intervals.
Quantitative Results:
Following 84 days of long-term exposure to total submersion…
The clay-based sample…
…more than tripled its volume, increasing by 271.26%
…more than doubled its weight, increasing by 145.21%
The EXPAND-Tite sample…
…increased its volume by only 66.68% and its weight by just 50.07%.
Qualitative Results:
Our evidence shows that significant increases in volume and weight (such as that registered by the clay-based product) result in excessive swelling, splintering, cracking and the eventual deterioration of the product.
Test Conclusion:
Excessive swelling, splintering, cracking and deterioration can cause changes in the size and the physical properties of the sealant. This could lead to excess pressure on the joint, followed by the eventual deterioration of the product and the loss of joint integrity.
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